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SubjectRe: [PATCH v3 0/7] spi: add support for octo mode
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Hi Yogesh

On 23/10/18 3:07 PM, Yogesh Narayan Gaur wrote:
> Add support for octo mode IO data transfer.
> Micron flash, mt35xu512aba, supports octal mode data transfer and
> NXP FlexSPI controller supports 8 data lines for data transfer (Rx/Tx).
>
> Patch series
> * Add support for octo mode flags and parsing of same in spi driver.
> * Add parsing logic for spi-mem framework and m25p80.c device file.
> * Add opcodes for octo I/O commands in spi-nor framework, Read and Write proto for (1-1-8/1-8-8) mode.
> Opcodes are added as per octal data IO commands required for mt35xu512aba [1] flash.
> * Add mode bit required for octo mode in nxp-fspi driver [2].
> * Define binding property 'spi-rx/tx-bus-width' for LX2160ARDB target [2].
>

You may have to rebase this series to avoid conflicts with recent spi.h
changes. Also, I suggest merging patches in [1] with this series if you
plan to post another version so that all bits are at one place.

Regards
Vignesh

> Cherry pick below 2 patches (from: https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git):
> c639f871febe6667d9afce28108c634e5636c735 spi: spi-mem: Fix inverted logic in op sanity check
> db122eb8a749a1eff038f9a282c620ab16c4be1d spi: spi-mem: Add extra sanity checks on the op param
>
> Tested on LX2160ARDB target with nxp-fspi driver, below are
> Read performance number of 1-1-1 and 1-1-8 read protocol.
>
> root@lxxx:~# cat /proc/mtd
> dev: size erasesize name
> mtd0: 04000000 00001000 "spi0.0"
> mtd1: 04000000 00001000 "spi0.1"
> root@lxxx:~# time mtd_debug read /dev/mtd0 0x0 0x1000000 0read
> Copied 16777216 bytes from address 0x00000000 in flash to 0read
>
> real 0m2.792s
> user 0m0.000s
> sys 0m2.790s
> root@lxxx:~# time mtd_debug read /dev/mtd1 0x0 0x1000000 0read
> Copied 16777216 bytes from address 0x00000000 in flash to 0read
>
> real 0m0.441s
> user 0m0.000s
> sys 0m0.440s
> root@ls1012ardb:~#
>
> Flash device MTD0 configured in 1-1-1 protocol.
> Flash device MTD1 configured in 1-1-8 protocol.
>
> [1] https://patchwork.ozlabs.org/project/linux-mtd/list/?series=70384
> [2] https://patchwork.ozlabs.org/project/linux-mtd/list/?series=72181
>
> Yogesh Gaur (7):
> spi: add support for octo mode I/O data transfer
> spi: spi-mem: add support for octo mode I/O data transfer
> mtd: spi-nor: add opcodes for octo Read/Write commands
> mtd: spi-nor: add octo read flag for flash mt35xu512aba
> mtd: m25p80: add support of octo mode I/O transfer
> spi: nxp-fspi: add octo mode flag bit for octal support
> arm64: dts: lx2160a: update fspi node
>
> Changes for v3:
> - Add octo mode support in spi_setup().
> - Rename all patches with 'octal' string modified as 'octo'.
> Changes for v2:
> - Incorporated review comments of Boris and Vignesh.
>
> arch/arm64/boot/dts/freescale/fsl-lx2160a-rdb.dts | 4 ++++
> drivers/mtd/devices/m25p80.c | 9 ++++++++-
> drivers/mtd/spi-nor/spi-nor.c | 15 ++++++++++++++-
> drivers/spi/spi-mem.c | 9 ++++++++-
> drivers/spi/spi-nxp-fspi.c | 4 ++--
> drivers/spi/spi.c | 12 ++++++++++--
> include/linux/mtd/spi-nor.h | 8 ++++++++
> include/linux/spi/spi.h | 2 ++
> 8 files changed, 56 insertions(+), 7 deletions(-)
>

--
Regards
Vignesh

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